Sewing-machine horn.



No. 740,810. PATENTED 001,6, 190's.

' I. A. 000K SEWING MACHINE norm.

APPLIGATIOH FILED SEPT. 20, 1902.

I0 MODEL.

' Q 5mm Witt names A W Patented October 6, 1903.

PATENT OFFICE.

IRVING A. COOK, OF LANCASTER, OHIO.

SEWING-MACHiNE HOR N.

SPECIFICATION forming part of Letters Patent No. 740,810, dated October1903- Application filed September 20, 1902. Serial No. 124,124. (Nomodel.)

To all whom it may concern:

Be it known that I, IRVING A. COOK, acitizen of the UnitedStates,residing at Lancaster, in the county of Fairfield and State ofOhio, have invented certain new and useful Improvements inSewing-Machine Horns; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to thefigures of reference marked thereon, which form a part of-thisspecification.

This invention relates to sewing-machines of the McKay type, in whichthe work is supported by a horn which enters the boot or shoe beingsewed.

The object of the invention is to improve the construction and operationof the whirl and of the tip and hearings in which it is supported.

A particular object is to make a removable.

bearing for the whirl, so that when it wears it can be removed andrenewed without renewal of the entire tip. The bearing being of suchsmall dimensions soon wears out, causing the whirl and itsdriving-pinion to jump cogs and miss stitches, and in thesecircumstances it has heretofore been necessary to provide a new tip.This is avoided by my invention, which also provides means whereby thewhirl can be got at and removed without removing its bearings. Thesemeans include a removable plug which acts as a support for the needleand a protection for the whirl.

The invention is illustrated in the accompanying drawings, in which-Figure 1 is a vertical section of the horntip and part of the horn. Fig.2 is a top view thereof.

Referring specifically to the drawings, 6'

indicates the horn, 7 the tip, and 8 the cap.

9 is the whirl, and 10 the pinion-shaft driving the same. The bearingfor the whirl is indicated at 11 and consists of an annular bushingwhich is screwed into a threaded socket formed in the tip to receive itand stops against a shoulder 7, projecting from the tip. This bushing ismade of brass or any other good wearing material and when screwed intothe socket against the shoulder it will not work loose, the direction ofthe threads being preferably the same as that of the rotation of thewhirl. When worn out, it can be readily removed and renewed withoutremoving the tip and without disconnecting the gearing of thepinion-shaft. This removal is eii'ected by taking ofi the cap 8, whenthe whirl can be lifted out and the bushing unscrewed. It will be seenthat the joint between the tip and the cap is formed at the greaterdiameter of the whirl, so that on removal ofthe cap the whirl can belifted out. A relatively long bearing-surface, as indicated at 9, isgiven the whirl, and it is thereby prevented from rocking or jumping andlasts longer than would otherwise be the case.

At 12 is indicated a frusto-conical plug screwed into a threaded openingformed in the cap above the whirl. This plug is made of hardened steeland serves to hold the whirl in place and to protect the same againstthe needle and tacks. Should the needle strike the plug during theoperation of the machine, its conical shape takes the strain ofi of itsthreads and prevents it being jammed down on the whirl. At the same timeits threads prevent it from jumping or working loose and permit it to beeasily removed and .renewed when worn.

By the construction above described the bushing 11 and the plug 12 arethe parts which receive all the wear or injury incident to the operationof the machine and the necessity for and expense of renewal of the tipand cap are avoided.

What I claim as new, and desire to secure by Letters Patent, is-

The combination with the whirl, of a separable horn-tip and capinclosing the whirl and meeting at the largest diameter thereof, abearing-bushing in the tip under the whirl, and an annular plugin thecap over the whirl,

substantially as described.

